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-rwxr-xr-xgraphics/asymptote/LspCpp/src/jsonrpc/StreamMessageProducer.cpp191
1 files changed, 191 insertions, 0 deletions
diff --git a/graphics/asymptote/LspCpp/src/jsonrpc/StreamMessageProducer.cpp b/graphics/asymptote/LspCpp/src/jsonrpc/StreamMessageProducer.cpp
new file mode 100755
index 0000000000..119e9040bd
--- /dev/null
+++ b/graphics/asymptote/LspCpp/src/jsonrpc/StreamMessageProducer.cpp
@@ -0,0 +1,191 @@
+
+#include "LibLsp/JsonRpc/StreamMessageProducer.h"
+#include <cassert>
+
+#include "LibLsp/JsonRpc/stream.h"
+
+
+bool StartsWith(std::string value, std::string start);
+bool StartsWith(std::string value, std::string start) {
+ if (start.size() > value.size())
+ return false;
+ return std::equal(start.begin(), start.end(), value.begin());
+}
+
+using namespace std;
+namespace
+{
+ string JSONRPC_VERSION = "2.0";
+ string CONTENT_LENGTH_HEADER = "Content-Length";
+ string CONTENT_TYPE_HEADER = "Content-Type";
+ string JSON_MIME_TYPE = "application/json";
+ string CRLF = "\r\n";
+
+}
+
+ void StreamMessageProducer::parseHeader(std::string& line, StreamMessageProducer::Headers& headers)
+ {
+ int sepIndex = line.find(':');
+ if (sepIndex >= 0) {
+ auto key = line.substr(0, sepIndex);
+ if(key == CONTENT_LENGTH_HEADER)
+ {
+ headers.contentLength = atoi(line.substr(sepIndex + 1).data());
+ }
+ else if(key == CONTENT_TYPE_HEADER)
+ {
+ int charsetIndex = line.find("charset=");
+ if (charsetIndex >= 0)
+ headers.charset = line.substr(charsetIndex + 8);
+ }
+ }
+ }
+
+
+void StreamMessageProducer::listen(MessageConsumer callBack)
+{
+ if(!input)
+ return;
+
+ keepRunning = true;
+ bool newLine = false;
+ Headers headers;
+ string headerBuilder ;
+ string debugBuilder ;
+ // Read the content length. It is terminated by the "\r\n" sequence.
+ while (keepRunning)
+ {
+ if(input->bad())
+ {
+ std::string info = "Input stream is bad.";
+ auto what = input->what();
+ if (what.size())
+ {
+ info += "Reason:";
+ info += input->what();
+ }
+ MessageIssue issue(info, lsp::Log::Level::SEVERE);
+ issueHandler.handle(std::move(issue));
+ return;
+ }
+ if(input->fail())
+ {
+ std::string info = "Input fail.";
+ auto what = input->what();
+ if(what.size())
+ {
+ info += "Reason:";
+ info += input->what();
+ }
+ MessageIssue issue(info, lsp::Log::Level::WARNING);
+ issueHandler.handle(std::move(issue));
+ if(input->need_to_clear_the_state())
+ input->clear();
+ else
+ {
+ return;
+ }
+ }
+ int c = input->get();
+ if (c == EOF) {
+ // End of input stream has been reached
+ keepRunning = false;
+ }
+ else
+ {
+
+ debugBuilder.push_back((char)c);
+ if (c == '\n')
+ {
+ if (newLine) {
+ // Two consecutive newlines have been read, which signals the start of the message content
+ if (headers.contentLength <= 0)
+ {
+ string info = "Unexpected token:" + debugBuilder;
+ info = +" (expected Content-Length: sequence);";
+ MessageIssue issue(info, lsp::Log::Level::WARNING);
+ issueHandler.handle(std::move(issue));
+ }
+ else {
+ bool result = handleMessage(headers,callBack);
+ if (!result)
+ keepRunning = false;
+ newLine = false;
+ }
+ headers.clear();
+ debugBuilder.clear();
+ }
+ else if (!headerBuilder.empty()) {
+ // A single newline ends a header line
+ parseHeader(headerBuilder, headers);
+ headerBuilder.clear();
+ }
+ newLine = true;
+ }
+ else if (c != '\r') {
+ // Add the input to the current header line
+
+ headerBuilder.push_back((char)c);
+ newLine = false;
+ }
+ }
+ }
+
+}
+
+void StreamMessageProducer::bind(std::shared_ptr<lsp::istream>_in)
+{
+ input = _in;
+}
+
+bool StreamMessageProducer::handleMessage(Headers& headers ,MessageConsumer callBack)
+{
+ // Read content.
+ auto content_length = headers.contentLength;
+ std::string content(content_length,0);
+ auto data = &content[0];
+ input->read(data, content_length);
+ if (input->bad())
+ {
+ std::string info = "Input stream is bad.";
+ auto what = input->what();
+ if (!what.empty())
+ {
+ info += "Reason:";
+ info += input->what();
+ }
+ MessageIssue issue(info, lsp::Log::Level::SEVERE);
+ issueHandler.handle(std::move(issue));
+ return false;
+ }
+
+ if (input->eof())
+ {
+ MessageIssue issue("No more input when reading content body", lsp::Log::Level::INFO);
+ issueHandler.handle(std::move(issue));
+ return false;
+ }
+ if (input->fail())
+ {
+ std::string info = "Input fail.";
+ auto what = input->what();
+ if (!what.empty())
+ {
+ info += "Reason:";
+ info += input->what();
+ }
+ MessageIssue issue(info, lsp::Log::Level::WARNING);
+ issueHandler.handle(std::move(issue));
+ if (input->need_to_clear_the_state())
+ input->clear();
+ else
+ {
+ return false;
+ }
+ }
+
+ callBack(std::move(content));
+
+ return true;
+}
+